It started in 2017 to be more precise, with Congress hearing from some of the military personnel involved.
In 2024, Congress heard again from four people: Luis Elizondo, former head of the Pentagon's Advanced Aerospace Threat Identification Program; Tim Gallaudet, oceanography expert and retired U.S. Navy officer; Michael Gold, former associate administrator for Space Policy and Partnerships at NASA and current member of the U.S. space agency's Independent UFO Studies team; and Michael Shellenberger, journalist and founder of the Breakthrough Institute.
Elizondo says that the Pentagon has a program called the All-domain Anomaly Resolution Office (AARO), which is common knowledge, but that this program is not presenting all the information they have about UAPs (Unidentified Anomalous Phenomena).
He criticized the excessive secrecy of this program and said it could lead to another 9/11 (referring to the time of the Twin Towers attacks, where different departments had information about the attack but did not share it with other departments).
Tim Gallaudet said that the navy and air force constantly encounter unidentified objects, and that these may be of non-human origin, due to the way they interact with military aircraft pilots.
Michael Shellenberger revealed information about the Immaculate Constellation program, whose objective would be to recover spacecraft for reverse engineering, and to collect high-quality information, images, and videos about UAPs (Unmanned Aerial Vehicles).
This document here is a summary of another document:
https://mace.house.gov/sites/evo-subsites/mace.house.gov/files/evo-media-document/Cannon 212_20241113_154539.pdf
Michael Gold stated that he possesses various data that could potentially provide evidence of UAPs and said that NASA could contribute more information.
There was also a hearing in the Senate, but that wasn't widely publicized.
In a new report released, the office says it has "no indication or confirmation" that UFO reports are "attributable to foreign adversaries."
www.space.com
Finally, Congress was set to try again to pass a freedom of information and witness protection law on the matter. In 2023, this law was passed, but in a flawed way, as there was lobbying from the Pentagon to modify the law (there was a premise to create a civilian committee to analyze the cases, but they changed it to a committee with people from the Pentagon).
Under the provision, the government will have to disclose some records about UFOs, but some transparency advocates don't think it goes far enough.
www.usatoday.com
Here is a timeline for the release of information: